Halloween Harry (Alien Carnage) (Dos game 1993)

Halloween Harry or Alien Carnage is a typical side-scrolling platform game made by SubZero Software published by Apogee Software. It has 4 episodes (mission). Unluckily, because of demo version, I can play only 1 mission, called 'office block'. The game rule is that you ought to rescue everybody. You can fly and buy diverse weapons in vending machines during playing the game.